As Channel 5 gears up to the return of Big Brother tomorrow night, we take look a back at previous houses, starting with the most famous room of all: The diary room! The iconic Diary room chairs have varied wildly over the past decade, as these pics show...

From carnival waltzers to transparent futuristic designs, the seat that has housed the bums of over 100 housemates over 10 years has changed drastically each series, and this year will be no different!

From midnight we'll have pictures of the new look Big Brother 2012 diary room chair, which is looking rather snazzy!

For now, take a look at the pictures below of the chairs throughout the years - what was your favourite Big Brother diary room chair?